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NOTE ON SOME EJECTA OF THE HOT SPEINGS OF 

 TARAWARA, NEW ZEALAND, FORMED SINCE THE 

 EARTHQUAKE OF 23rd JUNE, 1886. By J. P. O'REILLY, 

 C.E., V.-P., R.LA. 



[Read November 16, 1887.] 



The following letter, with a sample of the ejecta referred to 

 therein, was received by me, in August last, from Wm. Ferguson, 

 Esq., C.E., formerly of Trinity College, and of the Royal College 

 of Science, who, knowing the interest I took in all the phenomena 

 connected with the great eruption and earthquake of Tarawara 

 (23rd June, 1886), has had the goodness to send me the specimens 

 submitted. The quantity thereof is very small, but, under the 

 circumstances mentioned in his letter, of value : since, at least, the 

 exact chemical nature of these globules can be examined. As, 

 however, the form and surface appearance must also be of interest, 

 I have enlarged (about y) a portion of one of the globules, so as 



to show what struck me as being noteworthy characters. The 

 surfaces, exteriorly, are smooth, and nearly jet black ; more or less 

 globular and dimpled here and there, as shown in the enlarged 

 drawing : these dimples being seemingly the vesicules resulting 

 from the interior pressure of the heated gases or steam, which, 



